EP3212731A1 - Fluide de récupération de pétrole amélioré comprenant du carbonate de potassium, procédés associés et agencement - Google Patents

Fluide de récupération de pétrole amélioré comprenant du carbonate de potassium, procédés associés et agencement

Info

Publication number
EP3212731A1
EP3212731A1 EP15788388.5A EP15788388A EP3212731A1 EP 3212731 A1 EP3212731 A1 EP 3212731A1 EP 15788388 A EP15788388 A EP 15788388A EP 3212731 A1 EP3212731 A1 EP 3212731A1
Authority
EP
European Patent Office
Prior art keywords
oil
oil recovery
recovery medium
reservoir
potassium carbonate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP15788388.5A
Other languages
German (de)
English (en)
Inventor
Herbert HOFSTÄTTER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Montanuniversitaet Leoben
Original Assignee
Montanuniversitaet Leoben
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Montanuniversitaet Leoben filed Critical Montanuniversitaet Leoben
Publication of EP3212731A1 publication Critical patent/EP3212731A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/54—Compositions for in situ inhibition of corrosion in boreholes or wells
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
    • E21B43/20—Displacing by water
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
    • C09K2208/12—Swell inhibition, i.e. using additives to drilling or well treatment fluids for inhibiting clay or shale swelling or disintegrating
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
    • C09K2208/20—Hydrogen sulfide elimination

Definitions

  • the present invention relates to an oil recovery medium for injection into a ground hole in a ground comprising oil, a method of recovering oil from a reservoir utilizing the oil recovery medium, an arrangement for recovering oil from a reservoir, and a method of using an oil recovery medium or an arrangement for recovering oil from a reservoir.
  • tertiary recovery techniques In order to increase the recovery yield, so-called tertiary recovery techniques or enhanced oil recovery (EOR) techniques have been developed and employed.
  • Common tertiary recovery techniques include steam flooding, polymer flooding or surfactant flooding .
  • any of these conventional tertiary recovery techniques suffers from technical, environmental and/or economic disadvantages.
  • polymeric compounds are added to the water to be injected into a well or ground hole. Thereby, the viscosity of the flooding liquid can be increased resulting in an improved replacement effect for the crude oil.
  • these polymers show only little resistance to thermal and/or bacterial degradation so that their effect cannot be maintained for a long time.
  • the present invention aims at overcoming the above described problems and drawbacks of hitherto available tertiary oil recovery techniques.
  • the present inventor has found that by the addition of potassium carbonate to the flooding liquid, the chemical and physical properties of the flooding liquid can be manipulated in such a manner that an
  • optimized replacement fluid for oil from the ground can be obtained enabling an improved recovery rate of the oil.
  • the present invention relates to an oil recovery medium for injection into a ground hole, such as a well or a borehole, in a ground which comprises (crude or raw) oil, wherein the oil recovery medium comprises a base liquid and potassium carbonate.
  • the oil recovery medium according to the present invention is in particular suitable for recovering oil from a reservoir by replacement.
  • the present invention further relates to a method of recovering oil from a reservoir (such as an oil reservoir), wherein the method comprises injecting an oil recovery medium having the above mentioned features into at least a part of the oil reservoir whereby the oil recovery medium replaces oil from the oil reservoir (in particular, oil is pushed out of the reservoir by the oil recovery medium).
  • the present invention further relates to an arrangement for recovering oil from a reservoir, wherein the arrangement comprises a borehole configured for forming access from the surface (such as from the earth ' s surface) to the reservoir, and an oil recovery medium having the above mentioned features for injection and displacement at least a part of the oil.
  • the present invention relates to a method of using (or simply the use of) an oil recovery medium having the above mentioned features or an arrangement having the above mentioned features for recovering oil from a reservoir, in particular by replacement.
  • the expressions "at least partially”, “at least part of” or “at least a part of”, as used herein, may mean at least 5 % thereof, in particular at least 10 % thereof, in particular at least 15 % thereof, in particular at least 20 % thereof, in particular at least 25 % thereof, in particular at least 30 % thereof, in particular at least 35 % thereof, in particular at least 40 % thereof, in particular at least 45 % thereof, in particular at least 50 % thereof, in particular at least 55 % thereof, in particular at least 60 % thereof, in particular at least 65 % thereof, in particular at least 70 % thereof, in particular at least 75 % thereof, in particular at least 80 % thereof, in particular at least 85 % thereof, in particular at least 90 % thereof, in particular at least 95 % thereof, in particular at least 98 % thereof, and may also mean 100 % thereof.
  • the present invention relates to an oil recovery medium for injection into a ground hole in a ground comprising oil, wherein the oil recovery medium comprises a base liquid and potassium carbonate.
  • the oil recovery medium is for injection into a reservoir, such as an oil reservoir.
  • oil recovery medium may in particular denote a replacement fluid for oil which may be used for pushing out oil from the ground .
  • the oil recovery medium may be pumped or injected into a deep borehole for replacing (or supplanting) oil present in the ground from its deposit. Thereby, the replaced oil can be driven (or pushed) out of the reservoir and eventually out of the ground to the earth ' s surface.
  • the oil recovery medium may in particular be a flooding fluid .
  • the oil recovery medium may in particular be a solution, such as a clear solution.
  • the oil recovery medium may form a single phase, i.e. it does not represent a dispersion, such as a suspension or an emulsion.
  • the oil recovery medium may be free from solid particles, such as proppant particles typically used in a hydraulic fracturing medium.
  • the oil recovery medium according to the invention has to be distinguished from an oil (or gas) recovery medium used in hydraulic fracturing (fracking).
  • ground hole may in particular represent a borehole or a well. It may in particular denote a vertical, horizontal or slanted hole drilled in a formation, such as a rock, to access deeper regions of the formation in which oil may be located.
  • reservoir may in particular denote a subsurface pool of hydrocarbons, such as oil, contained in porous rock formations.
  • base liquid as used herein, may in particular denote a liquid component of the oil recovery medium to which solid components, such as potassium carbonate, may be added to render them flowable and in particular to (completely) dissolve them.
  • oil as used herein, may in particular denote raw oil or crude oil, i.e. oil in a form how it can be found in nature.
  • the base liquid may in particular comprise or consist of water.
  • pure water being available in large amounts and being completely
  • biocompatible can be used for the oil recovery medium.
  • other basic liquids may be implemented such as
  • the water is selected from the group consisting of fresh, brackish or even sea water or salt water, and deposit or saline water from aquifers.
  • Fresh water for instance tap water, is cheap and available even in large quantities.
  • Deposit water or separated water from oil production (reservoir fluid), for instance directly from the ground hole formed for recovery of the oil, is available directly at the location where the oil recovery medium is employed .
  • the use of deposit or separated water from oil production (reservoir fluid) is highly efficiently and does not deteriorate the properties of the oil recovery medium.
  • the oil recovery medium comprises potassium carbonate (K2CO3) .
  • the potassium carbonate may contain impurities of other salts or ions as well. Likewise, it may contain water of
  • potassium carbonate monohydrate such as potassium carbonate monohydrate, potassium carbonate sesquihydrate or potassium carbonate dihydrate.
  • the potassium carbonate may also be anhydrous.
  • Potassium carbonate can be found in nature and can also be prepared synthetically, for instance by absorbing carbon dioxide in potassium hydroxide. Potassium carbonate has turned out as an ideal component for an oil recovery medium to solve the object of the present invention.
  • Potassium carbonate is highly soluble in water (approximately 1120 g/l at 20 °C) so that it may serve as an appropriate means for increasing the density of the oil recovery medium thereby improving its ability to replace oil from the reservoir and to exert a buoyancy effect on the replaced oil.
  • the viscosity of the oil recovery medium may be controlled by potassium carbonate; thereby it may allow a further improvement in the ability of the oil recovery medium to replace oil from the reservoir.
  • the pH value of the oil recovery medium may be controlled by potassium carbonate; thereby it may buffer and
  • potassium carbonate has corrosion inhibiting properties and thereby it may prevent metallic parts of equipment in contact with the oil recovery medium from corroding.
  • potassium carbonate is biocompatible and environmentally uncritical.
  • potassium carbonate is resistant to thermal degradation (up to about 900 °C) as well as to bacterial degradation.
  • a particular beneficial property of potassium carbonate, in particular of the potassium ions thereof, is the ability of stabilizing clay mineral .
  • it may prevent swelling of clay minerals contained in the ground adjacent to the ground hole. Thereby, it may serve to maintain the ground hole in a form suitable for allowing transport of replaced oil from the ground; in other words, the potassium carbonate helps to avoid the formation of obstructions or blockages in the ground hole by swelling of the surrounding ground.
  • potassium carbonate has been shown to be of particular advantage for use in an oil recovery medium (as well as in the other aspects of the invention) so as to solve the object of the present invention.
  • a ratio between a mass of the potassium carbonate and a volume of the base liquid is in the range of from 1000 g/l to 1100 g/l, in particular in the range of from 1010 g/l to 1090 g/l.
  • the base liquid and the potassium carbonate are biocompatible materials, in particular natural materials.
  • the oil recovery medium is resistant to thermal and/or bacterial degradation.
  • the oil recovery medium may show a high stability and the advantageous effects thereof may be maintained over a long period of time.
  • the oil recovery medium reduces, in particular prevents, swelling of clay minerals contained in the ground .
  • it may serve to maintain the ground hole in a form suitable for allowing transport of replaced oil from the reservoir.
  • the oil recovery medium consists of the base liquid and potassium carbonate. In other words, in such embodiment no other components are contained in the oil recovery medium except for the base liquid, potassium carbonate and uncritical impurities. Thereby, a very cost-efficient and environment-friendly oil recovery medium can be provided .
  • the oil recovery medium is a non-fracturing oil recovery medium.
  • the oil recovery medium may be configured so as to not (mechanically, physically and/or chemically) manipulate the ground surrounding the ground holes, such as by forming fractures or additional channels.
  • the present invention relates to a method of recovering oil from a reservoir, in particular an oil reservoir, wherein the method comprises injecting an oil recovery medium having the above mentioned features into at least a part of the oil reservoir whereby the oil recovery medium replaces oil from the oil reservoir.
  • the method may further comprise the formation of a borehole (well) in the ground so as to enable access from the (earth ' s) surface to the reservoir.
  • the borehole may be formed in the ground by any conventional method in the field of oil recovery, such as (well) drilling or boring.
  • the oil recovery medium may be injected into at least a part of the oil reservoir by any conventional measure in a passive way and/or in an active way, such as by pumping . It might be advantageous to inject or introduce the oil recovery medium under pressure (elevated pressure), such as by using a (high-pressure) pump. Thereby, the replacement of oil from the reservoir by the oil recovery medium may be improved .
  • the oil recovery medium When injected into at least a part of the reservoir, the oil recovery medium replaces (supplants, displaces) oil present in the reservoir from the ground.
  • the ground will preferably not be (mechanically, physically and/or chemically) manipulated, such as fractured, by the oil recovery medium or in the method of recovering oil.
  • the method may in particular be a non-fracturing method of recovering oil from a reservoir.
  • the oil may be in particular heavy oil and/or raw oil, in particular heavy raw oil .
  • Such oil is typically highly viscous and is therefore difficult to recover.
  • the method according to the invention in particular by using the oil recovery medium of the invention, such oil can be very effectively recovered with an increased recovery yield and in a beneficial manner from any one of a technical, environmental and economic view.
  • the method according to the invention is in particular suitable for the recovery of such oil, but may of course be used for the recovery of other types of oil as well.
  • the present invention relates to an arrangement for recovering oil from a reservoir, wherein the arrangement comprises a borehole configured for forming (enabling) access from the surface to the reservoir, and an oil recovery medium having the above mentioned features for injection into at least a part of the borehole and/or the reservoir and for displacement of the oil.
  • the borehole may be formed by any conventional equipment in the field of oil recovery suitable for forming a borehole in a ground, such as bore or drill equipment.
  • the arrangement may further comprise such
  • the borehole may comprise one or more vertical borehole sections and/or one or more horizontal borehole sections, wherein different sections may be interconnected to one another and wherein slanted borehole sections are possible as well.
  • the present invention relates to a method of using (or to the use of) an oil recovery medium having the above mentioned features or an arrangement having the above mentioned features for recovering oil from a reservoir.
  • the oil may be recovered from the reservoir by replacement by the oil recovery medium, as explained in further detail in the foregoing .
  • the oil may be in particular heavy oil and/or raw oil, in particular heavy raw oil, as explained in further detail in the foregoing. While the present invention has been described in detail by way of specific embodiments and examples, the invention is not limited thereto and various alterations and modifications are possible, without departing from the scope of the invention.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Extraction Or Liquid Replacement (AREA)
  • Fats And Perfumes (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Abstract

Cette invention concerne un milieu de récupération de pétrole destiné à être injecté dans un trou dans un sol contenant du pétrole, un procédé de récupération de pétrole à partir d'un réservoir à l'aide dudit milieu de récupération de pétrole, un agencement pour la récupération de pétrole à partir d'un réservoir, et un procédé d'utilisation d'un milieu de récupération de pétrole ou un agencement pour la récupération de pétrole à partir d'un réservoir. Le milieu de récupération de pétrole destiné à être injecté dans un trou dans un sol contenant du pétrole comprend un liquide de base et du carbonate de potassium.
EP15788388.5A 2014-10-30 2015-10-29 Fluide de récupération de pétrole amélioré comprenant du carbonate de potassium, procédés associés et agencement Withdrawn EP3212731A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1419366.8A GB2531785A (en) 2014-10-30 2014-10-30 Bio enhanced oil recovery
PCT/EP2015/075181 WO2016066773A1 (fr) 2014-10-30 2015-10-29 Fluide de récupération de pétrole amélioré comprenant du carbonate de potassium, procédés associés et agencement

Publications (1)

Publication Number Publication Date
EP3212731A1 true EP3212731A1 (fr) 2017-09-06

Family

ID=52118468

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15788388.5A Withdrawn EP3212731A1 (fr) 2014-10-30 2015-10-29 Fluide de récupération de pétrole amélioré comprenant du carbonate de potassium, procédés associés et agencement

Country Status (6)

Country Link
US (1) US20170321110A1 (fr)
EP (1) EP3212731A1 (fr)
CA (1) CA3001493A1 (fr)
EA (1) EA201790947A1 (fr)
GB (1) GB2531785A (fr)
WO (1) WO2016066773A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10731448B2 (en) * 2017-04-25 2020-08-04 Borehole Seismic, Llc. Non-fracturing restimulation of unconventional hydrocarbon containing formations to enhance production
US11874418B2 (en) 2018-04-18 2024-01-16 Borehole Seismic, Llc. High resolution composite seismic imaging, systems and methods

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB363971A (en) * 1930-08-20 1931-12-31 Ig Farbenindustrie Ag Process of eliminating sodium carbonate from technical solutions of potassium carbonate
US2343081A (en) * 1942-02-26 1944-02-29 Robert D Pike Production of sodium and potassium carbonates
US3746109A (en) * 1972-01-10 1973-07-17 Shell Oil Co Shale stabilizing drilling process using an aqueous silicate solution of balanced salinity
US4589487A (en) * 1982-01-06 1986-05-20 Mobil Oil Corporation Viscous oil recovery
US4441555A (en) * 1982-04-27 1984-04-10 Mobil Oil Corporation Carbonated waterflooding for viscous oil recovery
US4702317A (en) * 1986-09-02 1987-10-27 Texaco Inc. Steam foam floods with a caustic agent
US4714113A (en) * 1986-12-05 1987-12-22 Ppg Industries, Inc. Alkaline water flooding with a precipitation inhibitor for enhanced oil recovery
FR2706471B1 (fr) * 1993-06-16 1995-08-25 Schlumberger Cie Dowell Polymères rhéofluidifiants, leur synthèse et leurs applications notamment dans l'industrie pétrolière.

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2016066773A1 *

Also Published As

Publication number Publication date
GB201419366D0 (en) 2014-12-17
GB2531785A (en) 2016-05-04
WO2016066773A1 (fr) 2016-05-06
EA201790947A1 (ru) 2017-10-31
CA3001493A1 (fr) 2016-05-06
US20170321110A1 (en) 2017-11-09

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